If your Spectrum email not working on Mac device, then check out the steps properly, as most of the time, the issue arises because of incorrect email settings. So, check out the Spectrum email settings and change them accordingly to resolve it:
Username: your Spectrum email address.
Password: your Spectrum email account password.
SSL: For both the IMAP and SMTP
Incoming Email Server: mobile.character.net
Outgoing Email Server: mobile.character.net
These are the correct email settings that you need to perform to smoothly use the Spectrum email. If you are dealing with Spectrum email not working on a Mac device, then follow the above-mentioned steps to use the Spectrum email smoothly.